4/180 big slick?

[pgjcbsn]

40 players left. ave stack is 6750

SB still has 15m so I'm thinking he has an underpair or maybe AQ, AJ, AK, or AXs. With AA or KK he would just call or min raise.

Is this auto call?

Poker Stars
No Limit Holdem Tournament
Blinds: t75/t150
8 players
Converter

Stack sizes:
UTG: t9700
UTG+1: t1621
MP1: t6655
MP2: t800
CO: t20210
Button: t18925
SB: t3555
hero: t4490

Pre-flop: (8 players) hero is BB with K[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img]
5 folds, Button calls t150 <font color="aaaaaa">(pot was t225)</font>, <font color="#cc0000">SB raises all-in t3555</font>, hero ?