To round 3.75 to the nearest hundredth, you need to look at the digit in the thousandths place, which is the third digit after the decimal point.
In 3.75, the digit in the hundredths place is 5, and the digit in the thousandths place (which is not written here but would be 0) is 0. Since the thousandths digit is less than 5, you do not round up.
Therefore, 3.75 rounded to the nearest hundredth remains 3.75.