Party NLHE $30 - AKo in big blind

This is a hand from last nights $30 tourney on Party. Villain has not entered many pots and when he has, played very aggressively.

(First attempt at posting hand, hope this is ok)

Party Poker No-Limit Hold'em Tourney, Big Blind is t300 (9 handed) FTR converter on zerodivide.cx

MP2 (t3054)
MP3 :Villain (t4427)
CO (t3640)
Button (t4945)
SB (t5855)
Hero (t7425)
UTG (t9435)
UTG+1 (t1750)
MP1 (t3686)

Preflop: Hero is BB with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">MP3 :Villain raises to t1427</font>, <font color="#666666">3 folds</font>, Hero ?

Now given the fact that i am out of position, and my read on this guy, what is the play here?