AK on bubble

[Triple Optics]

Villain in this hand was about 15/5 up to this point, other than that no real read.

How do you play this?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t40/t80
4 players
Converter

Stack sizes:
UTG: t5645
Button: t2455
SB: t3820
Hero: t1580

Pre-flop: (4 players) Hero is BB with A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img]
UTG folds, <font color="#cc0000">Button raises to t240</font>, SB folds, <font color="#cc0000">Hero ?</font>