What to do with KK here?

[Malificent]

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (7 handed) converter

Hero (t1810)
MP2 (t875)
CO (t820)
Button (t1375)
SB (t4245)
BB (t3330)
UTG (t1045)

Preflop: Hero is MP1 with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t400</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Button raises to t650</font>, <font color="#CC3333">SB raises to t4245</font>, <font color="#666666">1 fold</font>, Hero ???

This is a turbo $15+1. The button is generally unknown to me. SB I've played with in 5 or 6 of these turbos before and while I've not seen him enough to say whether he's good, he's definitely solid. Considering the action up to SB (raise, reraise), can I put him on the one hand I'm concerned about? Or is this just an easy call?