folding KK pf in 6 max for 100 bb?

[RikaKazak]

Well,
What do you guys think of this hand. Villian is a 40/7.3 with an AF of 1.4 after 684 hands. My mouse was over "fold" but then the words of my coached popped in my head, "for 100 BB in 6 max it is not a leak if you lose your stack to KK vs. AA ANYTIME unles vs. SUPER ROCK" what do you guys think? This is more of a general question and not a hand question. Thanks in advance, here's the hand that sparked this in my mind.

Party Poker No-Limit Hold'em, $ BB (6 max, 5 handed) FTR converter on zerodivide.cx

UTG ($862.90)
MP ($394)
Button ($400.84)
Hero ($357)
BB ($531.40)

Preflop: Hero is SB with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img]. Hero posts a blind of $2.
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $19</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero (poster) raises to $53</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $175</font>, Hero calls $302 (All-In), MP calls $182.

Flop: ($718) 6[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Turn: ($718) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: ($718) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $718