Need math to help on an insurance claim

I work in restoration and have a client that had a pipe burst while they were out of the country. The insurance company is giving us a lot of issues and I need to try and prove when this pipe burst. So, here is the Math problem:

3/4 inch copper line is broken and water is continuously flowing out of it

In total 1310 CCF were used which equates to 979,880 Gallons (748 gallons/ccf)