Villain is from Czech Republic; no other history. I've been quiet since getting to the table a few orbits ago, opening one other time to 900 and tid pre. Obv jamming is an option pre, but I felt I get flatted so rarely that b/c is fine too. Now that he's flatted and I've whiffed, what to do when checked to, given stacks?
Full Tilt Poker $22,500 Guarantee No Limit Hold'em Tournament - t200/t400 Blinds + t50 - 6 players
SB: t18546 M = 20.61
BB: t13973 M = 15.53
UTG: t6245 M = 6.94
Hero (MP): t7589 M = 8.43
CO: t11810 M = 13.12
BTN: t28869 M = 32.08
Pre Flop: (t900) Hero is MP with K

A
1 fold,
Hero raises to t900,
3 folds, BB calls t500
Flop: (t2300) 2

7

8
(2 players)
BB checks, Hero ?