I want to set custom price programmatically to the product in Magento 2

I want to set custom price programmatically and placed order with that price for that product in Magento 2.i have added below code. it set the original price. and original Custom price is updated properly in quote_item table. but custom price is not updated in quote_item table. due to that custom price is not set in order item details.

$quoteItem->setCustomPrice($setPrice);
$quoteItem->setOriginalCustomPrice($setPrice);
$quoteItem->getProduct()->setIsSuperMode(true);$quoteItem->save();