The standard enthalpy of combustion of propene, C3H6(g), is –1926 kJ mol-1. Given the tabulated bond — Thermochemistry Chemistry Question

The standard enthalpy of combustion of propene, C₃H₆(g), is –1926 kJ mol^-1. Given the tabulated bond dissociation enthalpies (BDEs), what is the bond dissociation enthalpy of a C=C bond?
C₃H₆(g) + 4.5 O₂(g) → 3 CO₂(g) + 3 H₂O(g) ∆H°rxn = –1926 kJ mol^-1