I don't have a co-signer and my score is 757, but I can't get approved for a car loan?

I've had credit for 1 year and 8 months now. I have 3 credit cards and I pay them off on time and do not keep high balances. Also I had an installment with bally total fitness and I paid that off within less than a year. I applied for a car loan for $10,000 and I was denied because I have limited credit history. What should I do because those inquiries were hard hits on my credit report and I don't want to try again and get denied and lower my score.