Should I be value betting this river?

[illegit]

It's one thing I sometimes have trouble figuring. Villain is very loose-passive

***** Hand History for Game 2983225732 *****
NL Texas Hold'em Trny:17147128 Level:4 Blinds (25/50) - Saturday, November 05, 00:56:00 EDT 2005
Table Multi-Table(505464) Table #17 (Real Money)
Seat 8 is the button
Total number of players : 10
Seat 1: fknjake ( $3260 )
Seat 2: SEBI444 ( $1189 )
Seat 3: bullorbear ( $560 )
Seat 4: D_PhoneMan ( $1640 )
Seat 5: markypoo0328 ( $1790 )
Seat 6: gcnmoo ( $465 )
Seat 7: illegit ( $2550 )
Seat 8: ICthenutz ( $400 )
Seat 9: puetz ( $2356 )
Seat 10: Pandita ( $1640 )
Trny:17147128 Level:4
Blinds (25/50)
** Dealing down cards **
Dealt to illegit [ Ac Qd ]
fknjake folds.
SEBI444 folds.
bullorbear folds.
D_PhoneMan folds.
markypoo0328 calls [50].
gcnmoo folds.
illegit raises [200].
ICthenutz folds.
puetz calls [175].
Pandita folds.
markypoo0328 folds.
** Dealing Flop ** [ 2s, 9c, Qh ]
puetz checks.
illegit bets [400].
puetz calls [400].
** Dealing Turn ** [ 8c ]
puetz checks.
illegit bets [375].
puetz calls [375].
** Dealing River ** [ 6s ]
puetz checks.
illegit ??????