There's no obvious pronunciation for it from first principles.
- '-kot' is rare
- 'nek-' is rare
- it's hard to tell where the syllables split in 'nekot' (though 'nek-ot' is more plausible).
And because English is so idiosyncratic, at least for shorter words, you're sort of left with nothing. In this case, a pronunciation is usually mandated: if it is a foreign borrowing or a one-off neologism, then someone just makes something up.
The snack makers (Lance) said it's /'ni: kɑt/ or 'knee-cot'.
Most people don't bother pronouncing it, and just point: 'Which ones? Those."