KJs with 3-betting power

[Roy6]

UTG raiser seems to be a TAG.
I was running very hot and the blinds were tight so I decided to 3-bet this.

I know my hand sucks on both flop and turn but given he's a TAG is our folding equity because of the preflop 3-bet worth enough to bet these streets?

Party Poker 3.00/6.00 Hold'em <font color="#0000FF">(6 handed)</font> link

Preflop: Hero is Button with K[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">1 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">2 folds</font>, UTG calls.

Flop: (7.33 SB) 5[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, UTG calls.

Turn: (4.67 BB) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">