750 miles is correct, you won't hurt anything if you go over say to 1000 miles as long as your filter is not full prior. Filter integrity is the key, with every application. Don't let it get full and keep driving over say a max of 1000 miles.No matter if its sludge ,dirt ,third party abrasives metal particulates it all ends up in the filter and thats where you want it to stay.
And change oil and filter at that point.