There isn't, they checked a,b,c up to 10^14 in some clever way. (10 months CPU time (2007)).
a^3 +b^3 + c^3 == n
where
n \[Element] {33, 42, 74, 114, 165, 390, 579, 627, 633, 732, 795, 906, 921, 975}
are not solved yet! I would love to bruteforce it (using Mathematica) up to 10^15, to --perhaps-- eliminate some of them. Maybe you have some parallel computing power left over ;)