How many terms of the series 1^3 + 2^3 + 3^3+ …………… should be taken to get the sum 14400?

How many terms of the series 1^3 + 2^3 + 3^3+ …………… should be taken to get the sum 14400?

How many terms of the series 13 + 23 + 33 + …………… should be taken to get the sum 14400?