Are you certain of the $7,000 value ? Where did you come up with that number ?? You should at least go to a couple of car dealers in your area and get a trade-in value on it. It may not be worth what you think it is. If it needs any repairs, you would deduct those costs from the value.
Since you likey can't exempt the entire amount with only at $1,200 exemption, you will either have to let the Trustee take it, or you can redeem it by paying the Trustee the difference as JetX stated. If you can't come up with that cash, there is a company called 722Redemption that makes loans to people in Bankrutpcy specifically for this purpose.