NLTRN - $10 HU

[theseus51]

Seat 1: aargn (1320 in chips)
Seat 2: theseus51 (1680 in chips)
theseus51: posts small blind 10
aargn: posts big blind 20
*** HOLE CARDS ***
Dealt to theseus51 [7c Ah]
theseus51: raises 40 to 60
aargn: calls 40
*** FLOP *** [7d 4c 7h]
aargn: checks
theseus51: bets 80
aargn: calls 80
*** TURN *** [7d 4c 7h] [5h]
aargn: checks
theseus51: bets 220
aargn: raises 220 to 440
theseus51: calls 220
*** RIVER *** [7d 4c 7h 5h] [2h]
aargn: bets 200
theseus51: ??

I was thinking either move in or just flat call. He had about 500 chips behind. I guess flat calling is the more conservative play. He seemed like a normal player, a bit agressive, but nothing out of line. He might've made a straight or had a full house, just wondering what you all think.

Results in white:
<font color="white">
theseus51: calls 200
*** SHOW DOWN ***
aargn: shows [Jd 7s] (three of a kind, Sevens)
theseus51: shows [7c Ah] (three of a kind, Sevens - Ace kicker)
theseus51 collected 1560 from pot</font>