PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (5 handed) converter

Button (t825)
Hero (t2275)
BB (t2365)
UTG (t4725)
MP (t3310)

Preflop: Hero is SB with J[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to t600</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t1000</font>, <font color="#666666">1 fold</font>, MP calls t400.

Flop: (t2200) 2[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets t1600</font>, Hero calls t1275 (All-In).

MP is a loose player who frequently tries to rob blinds. Was this the wrong play here? Should I play more tight on the bubble with 5 players left (because there is a small stacked guy)?