($6.50) AK midstages facing 3-bet shove

[sixfour]

Coldcaller is unknown, shover is competent multitabler who's playing this level despite having average buyin of $50ish, about breakeven profit and ROI on sharkscope. I don't believe that this is a squeeze. Our play is? Easy fold?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t60/t120
6 players
Converter

Stack sizes:
UTG: t1405
UTG+1: t1405
Hero: t3665
Button: t1865
SB: t1840
BB: t3320

Pre-flop: (6 players) Hero is CO with A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img]
2 folds, <font color="#cc0000">Hero raises to t350</font>, Button calls t350 <font color="aaaaaa">(pot was t530)</font>, SB folds, <font color="#cc0000">BB raises all-in t3320</font>