Tough hand w/ KJ

[ImNotSoLucky]

15K guaranteed on empire - down to 51 players - 30 get paid

Total number of players : 10
Seat 2: Cheetahhh ( $7020 )
Seat 6: Zheka_66 ( $2870 )
Seat 8: NotSoLucky0 ( $4590 )
Seat 9: Fastlife5 ( $2045 )
Seat 10: shupact ( $3860 )
Seat 1: thenuts7 ( $3550 )
Seat 3: ruinatotal ( $2206 )
Seat 7: boonlerts ( $8419 )
Seat 4: dcisme23 ( $2133 )
Seat 5: cambru ( $10125 )
Trny:14726849 Level:7
Blinds (100/200)
** Dealing down cards **
Dealt to NotSoLucky0 [ Kc Jc ]
shupact folds.
thenuts7 folds.
Cheetahhh folds.
ruinatotal folds.
dcisme23 folds.
cambru folds.
Zheka_66 folds.
boonlerts calls [200].
NotSoLucky0 calls [100].
Fastlife5 checks.
** Dealing Flop ** [ Th, Kh, 9c ]
NotSoLucky0 bets [300].
Fastlife5 calls [300].
boonlerts raises [800].
NotSoLucky0 ????????????????????????

Do i put him on a good hand (2 pair or better) or are there a number of hands he does this with that i am ahead of? After that, fold call or allin? Thanks for input