PokerStars No-Limit Hold'em, 1.5 Tournament, 100/200 Blinds (6 handed) - PokerStars Converter Tool from http://www.flopturnriver.com

CO (t1,065)
Button (t900)
SB (t5,375)
Hero (BB) (t3,175)
UTG (t1,805)
MP (t1,180)

Hero's M: 10.58

Preflop: Hero is BB with K, K
4 folds, SB bets t600

Total pot: t400

This was a tough spot for me. I had a stack that I was comfortable enough with for the time being, but the blinds of course were rising. I faced a raise from the one player that could put me out of the sng.

This was my first tournament with this opponent so I didn't have any numbers on him that are worthwhile.

Does anybody flat or fold here? Is this a shove? Do I 3-bet and fold to a shove?