Should I put new engine in my car?

I bought my 2010 Dodge Charger 2.5 years ago
with 32,000 miles on it.  At 48,500 miles the engine
seized.  Here’s my dilemma. I still owe about $5000
on the car..  the body of the car and inside of car is
in mint condition.  Oil changes were every 3 to
4,000 miles and the car wasn’t beat on.  It’s the v6
3.5 high output, with spoiler, brand new 18” wheels,
dvd, remote start, premium sound etc.  I know I’m
going to lose money on the deal but which do you
think I should do?  Should I sell the car as is (what
should I expect to get for it?). Or should I get a new
engine put in (got a quote of 5,400 for brand new
engine)?  Thanks in advance for the advice!